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Organic Solvent Nanofiltration of Water-in-Oil Pickering Emulsions—What Influences Permeability?

Authors :
Maresa Vivien Kempin
Anja Drews
Source :
Membranes, Vol 11, Iss 864, p 864 (2021), Membranes, Volume 11, Issue 11
Publication Year :
2021
Publisher :
MDPI AG, 2021.

Abstract

Pickering emulsions (PEs) have received increasing interest for their application in catalytic multiphase reactions. Organic solvent nanofiltration of PEs was shown to be a promising procedure for efficient and effective catalyst recycling. In this work, a systematic parameter study to identify the main influencing parameters on PE filtration was conducted for a large variety of PE compositions for the first time. In addition to temperature, only the type of organic solvent significantly influenced the filtration performance, which could be mathematically modeled via a combination of the solution–diffusion and the resistance in the series model. Particle type and concentration, dispersed phase fraction and the presence of reaction (by-)products did not show any significant impact on the permeability. The stirrer speed only became important when emulsions stabilized by particles without the tendency to form 3D network structures were filtered in long-term filtration experiments. These results pave the way towards the application of PE membrane filtration for catalyst recovery in continuous liquid/liquid multiphase reactions and enable broad operation windows. As the mechanical separation of PEs was shown to be a very robust process, the emulsion composition can now be tuned to meet the needs of the reaction without any (significant) loss in filtration performance.

Details

ISSN :
20770375
Volume :
11
Database :
OpenAIRE
Journal :
Membranes
Accession number :
edsair.doi.dedup.....32ff8b8f2ddaadf46128443a39cdb3f6
Full Text :
https://doi.org/10.3390/membranes11110864